Can't get my GeForce GT 430 to work

I recently purchased a EVGA 01G-P3-1335-KR GeForce GT 430 (Fermi) 1GB 64-bit DDR3 PCI Express 2.0 x16 HDCP Ready Video Card (http://www.newegg.com/Product/Product.aspx?Item=N82E16814130656) and I don't understand why it isn't working. I'm concerned it's defective but it's probably just as likely I'm overlooking something. I'm trying to put it in an older PC - an eMachines T3304. Here are the specs for the motherboard (http://support.gateway.com/s/MOTHERBD/FIC/105554/105554sp25.shtml). I have also upgraded to 1.5 GB of RAM and to a CORSAIR Builder Series CX430 V2 430W ATX12V v2.3 80 PLUS Certified Active PFC Power Supply. When I turn on the PC the fan on the video card doesn't even spin... Is there something I'm missing here?